My Nitrate has been zero for years and I was feeding a bit more to try and raise my Nitrate to about 2ppm. Thanks to a faulty test kit I raised it to 20ppm. I did a large water change and brought it down to about 15ppm. Because my tank normally consumes the Nitrate, should it come down on its own or should I do something else to drop the Nitrate? Thanks in advance.



